Changes the contract of the parser to have a valid character stream passed
in the ParseInfo rather than the current situation where either:
 - it is passed explicitly (e.g., for streaming scripts)
 - a Script is passed and a character stream is created for this
 - or a source and encoding is passed in ParseInfo and the character stream
   is created from this.

The parse info also now owns the character stream (in a unique_ptr). It
can be destroyed using a new ResetCharacterStream() function. This will
enable the character stream to be kept live if any functions are asm.js
modules which were parsed, in order to be reused by the asm.js parser.

BUG=v8:5203

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ifda167391b2eadb38ebf9fcb2f565d2ed9ea3c6f
Reviewed-on: https://chromium-review.googlesource.com/616767
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47474}

Rather than lumping in parsing, bytecode compilation and optimized
compilation all into the same VM "compile" state, seperate them out
into individual states.  Additionally, add support for these states
to tickprocessor and profview.

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I5be943e23cae042e32e9ccb24415c67c18658b4b
Reviewed-on: https://chromium-review.googlesource.com/608973
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47283}

Splits out AttachOuterScopeInfo from DeclarationScope::Analyze and attaches
the outer scope info after parsing has completed (when parsing on the main
thread, which is the only time we have an outer scope info) instead of
during Compiler::Analyse().

BUG=v8:5203

TBR=yangguo@chromium.org

Change-Id: Idd8d2409fb20f09a9f6bbf5cff7e6edcf90077d7
Reviewed-on: https://chromium-review.googlesource.com/605889
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47243}

Moves parser internalization of ast values out of 
ParseAny/Program/Function and instead internalizes during compile 
finalization. Currently also internalizes during scope analysis if
there is a ScopeInfo to enable variable name lookups. We also 
internalize early for FCG / AstGraphBuilder.

BUG=v8:5203

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ia766795947d847517b87cd5ea39797347083174b
Reviewed-on: https://chromium-review.googlesource.com/582407Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46904}

Removes the SharedFunctionInfo field from the ParseInfo structure. Instead
require a SharedFunctionInfo to be explicitly passed to ParseFunction.
Also renames GetUnoptimizedCode to CompileUnoptimizedFunction to make it
clear it should only be called for non-top-level code.

BUG=v8:5203

Change-Id: Ibce016e6a5290c3685f7f0a2f5fb1eb2df2ffc3b
Reviewed-on: https://chromium-review.googlesource.com/574589
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46814}

A step towards removing isolate from ParseInfo.
Removing isolate from ParseInfo will make it easier to create and
execute parse tasks on background threads.

BUG=v8:6093

Change-Id: I0a3546618d01b9232014da94cf8d0f72427a0d1d
Reviewed-on: https://chromium-review.googlesource.com/458006
Commit-Queue: Wiktor Garbacz <wiktorg@google.com>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44176}

In order to compile eager inner functions on a background thread we need to
keep the handles created during parsing and scope analysis alive until the
background compilation is complete. In order to do that, we allocate the
handles in a deferred handle scope and keep the deferred handles alive with
a shared_ptr in the ParseInfo and CompileInfo respectively.

BUG=v8:5203

Review-Url: https://codereview.chromium.org/2650883002
Cr-Commit-Position: refs/heads/master@{#43107}

Revert of [Compiler] Enable handles created during parsing and scope analysis to be deferred. (patchset #9 id:180001 of https://codereview.chromium.org/2650883002/ )

Reason for revert:
Issue on arm64:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20arm64%20-%20sim/builds/5752

Original issue's description:
> [Compiler] Enable handles created during parsing and scope analysis to be deferred.
>
> In order to compile eager inner functions on a background thread we need to
> keep the handles created during parsing and scope analysis alive until the
> background compilation is complete. In order to do that, we allocate the
> handles in a deferred handle scope and keep the deferred handles alive with
> a shared_ptr in the ParseInfo and CompileInfo respectively.
>
> BUG=v8:5203
>
> Review-Url: https://codereview.chromium.org/2650883002
> Cr-Commit-Position: refs/heads/master@{#43091}
> Committed: https://chromium.googlesource.com/v8/v8/+/9346cd9b4c50466aa8d50e98c56b84ba47c2a115

TBR=marja@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5203

Review-Url: https://codereview.chromium.org/2687973003
Cr-Commit-Position: refs/heads/master@{#43093}

In order to compile eager inner functions on a background thread we need to
keep the handles created during parsing and scope analysis alive until the
background compilation is complete. In order to do that, we allocate the
handles in a deferred handle scope and keep the deferred handles alive with
a shared_ptr in the ParseInfo and CompileInfo respectively.

BUG=v8:5203

Review-Url: https://codereview.chromium.org/2650883002
Cr-Commit-Position: refs/heads/master@{#43091}

Downside: this adds all kinds of weird includes in the .cc files.

(See design doc linked in the bug.)

BUG=v8:5402

Review-Url: https://codereview.chromium.org/2622503002
Cr-Commit-Position: refs/heads/master@{#42140}

Also move them to a separate interface header to avoid having to include
parser.h so much

BUG=v8:5589
R=verwaest@chromium.org,marja@chromium.org

Review-Url: https://codereview.chromium.org/2534393002
Cr-Commit-Position: refs/heads/master@{#41386}